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\section*{4.  Pfeil- und Zeigersymbole:}

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$\leftarrow   $ \verb|:\leftarrow   \gets|\\ 
$\Leftarrow   $ \verb|:\Leftarrow|\\ 
$\rightarrow  $ \verb|:\rightarrow  \to|\\ 
$\Rightarrow  $ \verb|:\Rightarrow|\\ 
$\leftrightarrow    $ \verb|:\leftrightarrow|\\ 
$\Leftrightarrow    $ \verb|:\Leftrightarrow|\\ 
$\mapsto            $ \verb|:\mapsto|\\ 
$\hookleftarrow     $ \verb|:\hookleftarrow|\\ 
$\leftharpoonup     $ \verb|:\leftharpoonup|\\ 
$\leftharpoondown   $ \verb|:\leftharpoondown|\\ 
$\rightleftharpoons $ \verb|:\rightleftharpoons|\\ 
$\longleftarrow     $ \verb|:\longleftarrow|\\ 
$\Longleftarrow     $ \verb|:\Longleftarrow|\\ 
$\longrightarrow    $ \verb|:\longrightarrow|\\ 
$\Longrightarrow    $ \verb|:\Longrightarrow|\\ 
$\longleftrightarrow$ \verb|:\longleftrightarrow|\\ 
$\Longleftrightarrow$ \verb|:\Longleftrightarrow|\\ 
$\longmapsto        $ \verb|:\longmapsto|\\ 
$\hookrightarrow    $ \verb|:\hookrightarrow|\\ 
$\rightharpoonup    $ \verb|:\rightharpoonup|\\ 
$\rightharpoondown  $ \verb|:\rightharpoondown|\\ 
$\leadsto     $ \verb|:\leadsto|\\ 
$\uparrow     $ \verb|:\uparrow|\\ 
$\Uparrow     $ \verb|:\Uparrow|\\ 
$\downarrow   $ \verb|:\downarrow|\\ 
$\Downarrow   $ \verb|:\Downarrow|\\ 
$\updownarrow $ \verb|:\updownarrow|\\ 
$\Updownarrow $ \verb|:\Updownarrow|\\ 
$\nearrow     $ \verb|:\nearrow|\\ 
$\searrow     $ \verb|:\searrow|\\ 
$\swarrow     $ \verb|:\swarrow|\\ 
$\nwarrow     $ \verb|:\nwarrow|\\ 
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